package com.usian.controller;


import cn.hutool.json.JSONObject;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.internal.util.AlipaySignature;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.usian.config.AliPay;
import com.usian.config.AliPayConfig;
import com.usian.service.UserService;
import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;

/**
 * @author 米西米西
 */
@RestController
@RequestMapping("app/user/alipay")
public class AliPayController {

    @Autowired
    private UserService userService;

    private static final String GATEWAY_URL = "https://openapi-sandbox.dl.alipaydev.com/gateway.do"; // 支付宝开放平台网关地址
    private static final String FORMAT = "JSON"; // 请求格式
    private static final String CHARSET = "UTF-8"; // 字符集
    // 签名方式
    private static final String SIGN_TYPE = "RSA2";
    @Resource
    private AliPayConfig aliPayConfig; // 注入支付宝配置

    /**
     * 处理支付请求
     *
     * @param aliPay       支付参数对象
     * @param httpResponse 响应对象
     * @throws Exception 抛出异常
     */
    @GetMapping("/pay") // &subject=xxx&traceNo=xxx&totalAmount=xxx
    public void pay(AliPay aliPay, HttpServletResponse httpResponse) throws Exception {
        // 1. 创建Client，通用SDK提供的Client，负责调用支付宝的API
        AlipayClient alipayClient = new DefaultAlipayClient(GATEWAY_URL, aliPayConfig.getAppId(),
                aliPayConfig.getAppPrivateKey(), FORMAT, CHARSET, aliPayConfig.getAlipayPublicKey(), SIGN_TYPE);

        // 2. 创建 Request并设置Request参数
        AlipayTradePagePayRequest request = new AlipayTradePagePayRequest();  // 发送请求的 Request类
        request.setNotifyUrl(aliPayConfig.getNotifyUrl()); // 设置异步通知地址
        JSONObject bizContent = new JSONObject();
        bizContent.set("out_trade_no", aliPay.getTraceNo());  // 我们自己生成的订单编号
        bizContent.set("total_amount", aliPay.getTotalAmount()); // 订单的总金额
        bizContent.set("subject", aliPay.getSubject());   // 支付的名称
        bizContent.set("product_code", "FAST_INSTANT_TRADE_PAY");  // 固定配置
        request.setBizContent(bizContent.toString()); // 设置业务内容

        // 执行请求，拿到响应的结果，返回给浏览器
        String form = "";
        try {
            form = alipayClient.pageExecute(request).getBody(); // 调用SDK生成表单
        } catch (AlipayApiException e) {
            e.printStackTrace(); // 打印异常堆栈信息
        }
        httpResponse.setContentType("text/html;charset=" + CHARSET); // 设置响应内容类型
        httpResponse.getWriter().write(form); // 将完整的表单HTML输出到页面
        httpResponse.getWriter().flush(); // 刷新输出流
        httpResponse.getWriter().close(); // 关闭输出流
    }

    /**
     * 处理支付宝异步通知
     *
     * @param request 请求对象
     * @return 响应字符串
     * @throws Exception 抛出异常
     */
    @PostMapping("/notify") // 注意这里必须是POST接口
    public String payNotify(HttpServletRequest request) throws Exception {
        if (request.getParameter("trade_status").equals("TRADE_SUCCESS")) { // 检查交易状态是否为成功
            System.out.println("=========支付宝异步回调========");
            Map<String, String> params = new HashMap<>(); // 存储请求参数
            Map<String, String[]> requestParams = request.getParameterMap(); // 获取所有请求参数
            for (String name : requestParams.keySet()) {
                params.put(name, request.getParameter(name)); // 将参数放入Map中
                // System.out.println(name + " = " + request.getParameter(name));
            }

            String tradeNo = params.get("out_trade_no"); // 商户订单号
            String gmtPayment = params.get("gmt_payment"); // 交易完成时间
            String alipayTradeNo = params.get("trade_no"); // 支付宝交易凭证号

            String sign = params.get("sign"); // 签名
            String content = AlipaySignature.getSignCheckContentV1(params); // 获取待签名字符串
            boolean checkSignature = AlipaySignature.rsa256CheckContent(content, sign, aliPayConfig.getAlipayPublicKey(), "UTF-8"); // 验证签名
            // 支付宝验签
            if (checkSignature) { // 验签通过
                // 打印交易信息
                System.out.println("交易名称: " + params.get("subject"));
                System.out.println("交易状态: " + params.get("trade_status"));
                System.out.println("支付宝交易凭证号: " + params.get("trade_no"));
                System.out.println("商户订单号: " + params.get("out_trade_no"));
                System.out.println("交易金额: " + params.get("total_amount"));
                System.out.println("买家在支付宝唯一id: " + params.get("buyer_id"));
                System.out.println("买家付款时间: " + params.get("gmt_payment"));
                System.out.println("买家付款金额: " + params.get("buyer_pay_amount"));
                // 更新付款记录表
                userService.addAlipay(
                        params.get("subject"),
                        params.get("trade_no"),
                        params.get("out_trade_no"),
                        params.get("total_amount"),
                        params.get("buyer_id"),
                        params.get("gmt_payment"),
                        params.get("buyer_pay_amount")
                );
            }
        }
        return "success"; // 返回成功响应
    }


}
